《Advanced Science》国仪高压储氢吸附仪助力AlH₃室温光致释氢性能取得关键突破
氢能规模化应用的核心瓶颈在于安全高效的储运技术。固态储氢材料中，氢化铝（AlH3）虽具有10.1wt%的超高理论容量，却因本征热力学稳定性过强，脱氢温度高达150-200°C，不得不依赖外部电热驱动。利用太阳能介入虽可摆脱外源电能束缚，然现有光热路径需历经“光→热→化学”的多级能量转换，梯级损耗显著；而紫外光催化路径则受限于紫外波段仅占太阳光谱的4%，光子利用效率极低。因此，如何在宽光谱范围内实现高效的光子-化学能直接转化，突破AlH3的热力学壁垒，便成为该方向亟待攻克的核心科学问题。
针对上述难题，安徽大学梁飞教授团队创新性地提出了基于可见光驱动的非热力学光催化调控策略，通过系统的实验表征与第一性原理计算，首次揭示了原位生成的Al/MOF异质结构中等离激元热电子注入对界面电荷转移的调控机制，并结合AlH3在光催化剂表面的化学吸附行为，实现了室温超低光强下脱氢速率与储氢释放容量的双重突破。这一发现为高能量密度固态储氢体系的光催化脱氢提供了一种颠覆性的高效范式。
Figure 1. Schematic illustration of this study. Visible-light-driven photocatalytic dehydrogenation mechanism of AlH3.
排除干扰，直击真相
在展示相关数据前，研究团队首先解答了一个严谨的科学问题：MOF作为多孔材料，会不会因为物理吸附氢气而造成“假阳性”或储量流失？
Supplementary Figure 3的等温吸脱附曲线给出了答案：在25°C、1 MPa压力下，MOF的氢气吸附量仅为0.056 wt.%，且在常压（0.1 MPa）下几乎不吸收氢气。这一硬核数据排除了多孔材料物理吸氢的干扰，证实了MOF在复合体系中仅作为高效光催化剂存在，确保了后续实验数据的绝对纯净与可靠。
Supplementary Figure 3. Hydrogen adsorption-desorption isotherm measurement of MOF at 25°C.
超低光强下的倍增奇迹
效率提升：在极低光强（0.37 W cm-2）的可见光照射下，最佳复合体系AlH3-MOF (1%) 的脱氢速率稳定在30.8 µmol g-1 min-1，较室温暗环境（1.5 µmol g-1 min-1）足足提升了20.5倍。
超越纯热驱动：在无主动水冷、近环境温度（55°C）下，光驱动180 min内的脱氢量达到4.7wt.%。对比同等温度下的纯热驱动脱氢，光驱动的产氢量整整是热驱动的2.1倍。
Figure 4. Visible-light-driven photocatalytic dehydrogenation performance and characterization of AlH3-MOF.
(a) Visible-light-driven hydrogen release profiles of AlH3-MOF and ball-milled AlH3 under visible light irradiation (0.56 W cm-2) at room temperature (with error bars representing the standard deviation: n = 3).
(b) Visible-light-driven hydrogen release profiles of AlH3-MOF (1%) under different light intensities at room temperature (with error bars representing the standard deviation: n = 3).
(c) Hydrogen release rates of AlH3-MOF (1%) at room temperature under (i) visible light irradiation (0.37 W cm-2) and (ii) dark conditions.
Supplementary Figure 14. Visible-light-driven (0.37 W/cm2) hydrogen release without active water-cooling and isothermal hydrogen release profile at 55 °C of AlH3-MOF (1%), respectively.
底层热力学的“逆转魔法”
化“吸热”为“放热”：未受光激发的纯AlH3脱氢路径，其自由能变化（ΔG）为 + 0.56 eV，是一个热力学上极度不利的吸热过程。而耦合光催化剂后，界面电子的重新分布使得该路径的ΔG降低为-0.09 eV，变为了自发的放热反应。
打通决速步：在最艰难的脱氢决速步（AlH2 → AlH）中，光生载流子的精准介入使反应能垒大幅降低了39%（从1.73 eV骤降至1.05 eV）。
Figure 6. Density functional theory calculations of AlH3-Al/MOF. Side view of optimized structures
(a) before and (b) after adsorption of AlH3 cluster on Al/MOF surface.(c) Side view of the electron density difference map of AlH3-Al/MOF.
(d) H-1s PDOS of AlH3, Al/MOF, and AlH3-Al/MOF. (e) Free energy profiles for AlH3 complexation and stepwise dehydrogenation on Al/MOF surface.
(f) Al-H bond lengths of AlH3 after adsorption on Al/MOF surface.
国仪量子H-Sorb 4600PCT Pro高压储氢吸附仪
高压储氢吸附仪可以实现材料在不同温度及不同高压环境下对氢气的吸放氢行为检测，可有效表征材料吸放氢温度和压力、吸放氢量、吸放氢速率等储氢材料吸放氢热/动力学关键性能。
.png)
产品特点：
测试数据稳定复现，LaNi5吸附量重复精度高达±1%
钴合金高压气动阀门支持5万次以上超长吸脱附循环测试
任意项目（PCT、Kinetics、Cycle、TPA/TPD）全自动连续组合测试
极速温压控制，结合自动连用功能综合测试效率提升40%
可定制20g-1000g级宏量测试系统、原位XRD及质谱联用系统
AI科研助手，数据问题智能解答、测试性能辅助分析
全自动吸脱附变温测试（PCT、Kinetics、Cycle）
全自动连续多温度测试（PCT、Kinetics）
近期助力成果目录
1.Solvent-mediated partial ionicity enhances mechanical nanosizing effect of Mg-based hydrogen storage alloys. Nature Communications (2026）
2.Room-Temperature Alane Dehydrogenation for Visible-Light-Driven Photocatalytic Hydrogen Supply System. Advanced Science (2025)
3.Dual‐Stage Heat Treatment for Enhanced Hydrogen Storage Properties of Mg-N-Y Alloys. Rare Metals (2026)
4.A novel carbon-induced-porosity mechanism for improved cycling stability of magnesium hydride. Journal of Magnesium and Alloys (2025)
5.Impacts of Y addition on the hydrogen storage performance of Ti-Zr-Mn-Cr-Fe alloys. Journal of Alloys and Compounds (2026)
6.Effect of Ni doping on hydrogen storage kinetics and thermodynamic properties of ball-milled Nd-Mg alloy. Journal of Alloys and Compounds (2025)
7.Superior de/hydriding kinetics and cycling stability of Mg-CeAl3@CeH2 nanocomposites. Journal of Alloys and Compounds (2025)
8.Doping-induced enhanced hydrogenation resistance and structural stability in SmCo5 permanent magnets: A combined theoretical and experimental study. Journal of Alloys and Compounds (2026)
9.Breaking kinetic and thermodynamic barriers: CeO2-Ni-rGO synergistic catalysis for comprehensively enhanced hydrogen storage performance of MgH2. Journal of Alloys and Compounds (2026)
10.Structural and Phase Evolution in the Mg-Al System Leading to Lower Hydrogen Desorption Temperature. Hydrogen (2025)
11.Interpretable machine learning framework for hydrogen storage capacity prediction in Ti-Zr-Mn-Cr-V high-entropy alloys: Influenced by valence electron average. Journal of Energy Storage (2026)
12.Dual-strategy regulation for enhancing hydrogen storage performance of non-activated Mg8Ni-TiO2/MnO2 composites. Journal of Energy Chemistry (2025)
13.Nanoscale effect of spontaneous combustion of sulfur corrosion products: Oxygen adsorption and activation mechanism dominated by mesopores. Fuel (2026)
14.Pore structure reconfiguration and microscale fluid response in bituminous coal under CO2 and flue gas-enhanced coalbed methane recovery. Fuel (2026)
15.Experimental and theoretical investigation on hydrogen storage performance of titanium decorated hexagonal boron nitride. Applied Surface Science (2026)
16.Cu-based methanol steam reforming catalyst supported by heat conduction enhanced GO+UiO-66 composite MOF material for long-term stable hydrogen production. International Journal of Hydrogen Energy (2025)
